7/8 x c for c =8. how do i figure out the answer to this problem?

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x

Simplify the rational expression. state any restrictions on the variable. t^2-4t-12 / t-8 the / is a fraction sign.

Write each rational number in the form a/b, where a and b are integers. 1. 5 1/6 2. -12